Thank you, that was really kind of you to go to all the trouble of giving a detailed explanation. I do have the Mturk Suite installed but it was slowing down my speed while working so I was just using Turkopticon. I didn't even think to message the requesters, I just returned the work after reporting it.It happens
When it does, contact the requester. If you have Mturk Suite installed, in the HIT frame, you can click "Hit Details" and it'll have a contact button. If you submit the HIT, you can also go into your work history on your dashboard for that day and there'll be a contact button beside the job.
The majority if requesters are very good at helping people who run into technical problems with their HITs.
With jobs that have link or audio problems, message them when you run into the issue. For those types of circumstances, I don't recommend submitting the HIT unless you were able to complete all the work. In an example where, say, you run into a broken link, it's best to let them know and wait for them to get back to you. Sometimes they will set up another HIT for you to do or will just tell you to submit for compensation. Other times they might just bonus you the compensation. It just depends on the requester. (There is that off chance they don't reply, though - so try to use your best judgement.)
For the jobs where you finish and aren't given a code, you can submit with your Mturk ID and send them a message letting them know. I've done this a lot for no-code HITs and usually they'll get back to you and approve your work. (Again, sometimes you might get a requester who doesn't reply to emails - but this is just somewhat of a risk you have to take. Most do reply and are very helpful.)
That being said, I've never had a requester reject over missing codes, so long as I message them about it after I submit. Sometimes they don't reply but approve it. It varies by requester but it's a good practice to get into so you're protecting your time and effort. Otherwise, when you return these jobs, you're not getting paid at all, which in my opinion is much worse than taking the small risk or getting a few rejections.
TLDR: when in doubt, always message the requester.
I hope this helps
You're welcome
I'm glad I could help with that.
Sometimes these things happen. It doesn't make you lesser or 'stupid'. Mturk can be a beast at times, but everyone on here has made some kind of 'mistake' during their time turking. It's all in the name of learning though, and now that you know, you can be more choosy with your work Sometimes a nice bath or some pampering is in order to get you back in the game. Just remember, we're all here for you! You got this! You can do this! You will persevere! 
Oh, my Gosh, you should just have a PayPal button in your signature for giving good advice, lol.You're welcome
Awwww, try not to be so hard on yourself
When I first started turking, I did a lot of work for a certain requester (*cough*John Brelig*cough*) and had all of it rejected haha. But as long as you keep doing tasks, your buffer for rejections will get bigger and they won't hurt so much. I know it can be difficult when your account is new, though... just do what you can and cut yourself some slack
On a site note, if some of those tasks you did had issues (even if it's something where, say, you thought you were doing them right but aren't sure), it might be a good idea to message them. Sometimes just explaining to a requester what's going on can save you from some rejections, especially if they know you are new to this. Might not always pan out (because sometimes there are those requesters who just don't reply or don't fix issues) but it can make you feel better knowing you did what you could.
I recommend peeking around in the daily work threads if you haven't already and see what jobs people post. The forum is really good at picking out HITs and requesters that are worth working for. TO is good to check before working for requesters, but sometimes it isn't always accurate. Sometimes a requester will have a red TO for some silly reason and actually be a good person to work for.
Now that that's said... don't forget to take time for yourself, especially when you're feeling stressed out.
Log in or register now. to view Spoiler content!
Hahaha that's quite nice of you to say
I'm just happy to help. And no worries on Brelig ~ That was over two years ago and after turking this long, my account recovered. 
And once you get beyond the milestones (5k hits, 10k hits, etc) you'll start seeing more work, too Crowdsurf is pretty good, imo. They also have their own website where they give out bonuses. My bf informed me it has a difficult qualification test, but it might be worth checking out if you enjoy those tasks 
