Walmart Inc. Walmart Inc sent me a check of 1987.00 to deposit to my account and was returned as invalid check after i did the jobs Internet

I hope by now you realize that Walmart was not the one who sent you the check.

Unfortunatly you got scammed and you are lucky that if the only thing that comes out of it is you owing the money you are now out.  Because the reality of it is you commited a crime by depositing that fake check and if the authorities wanted to they could come after you criminally.  Now, they rarely do, so it is not something you need to really worry about.  I am just trying to make it clear to you(and who ever else reads this) how serious of a situation you are actually in.

Now, how the scam works is quite simple..they rely on greed.  After all, what other job do you know pays about $200-$350/hr?  As I can just about guarantee you that the "job" they gave you took you barely over an hour to complete.  So to many people they see this as "easy money" ignoring just about every red flag out there.

I noticed how you failed to mention what you did with the remaining $1600 or so.  Well I can tell you that they asked you to get a Money Gram and/or Pre-Paid Debit card..right?   They may have even said that you can wait until the check "clears" because they know full well that it will "clear" within a day or so but then only a few days after that(and after you took out the funds) that it will come back as bad. 

As for the people who sent it, unfortunatly they are not even in the US so trying to catch them is a very low priority and in a few days they will move onto an entirely new area.

So in the end anytime ANYONE you do not personally know and trust sends you a check and asks you to cash it and send any portion of it back you can be guaranteed that it is a SCAM.  It doesn't matter what the reason is...it is a SCAM.  Even if they tell you you wait until it "clears" it is a SCAM.  Even if it is only a few dollars..it is a SCAM.  Regardless of how much you want to believe that someone out of the blue is just going to send you a check...keep repeating SCAM...SCAM..SCAM.