<prompt> Human: A good friend of mine made 20,000 last year.She is 23 and lives with her mom, when she went to file her return via HR block she owed a decent chunk of . She thinks it can be ignored and she will be fine. Said she will just have her mom claim her and seems to think it will all go away.Ive tried convincing her for two weeks this sounds like a terrible idea but she is dead set on it. So my next question is, How long before the IRS comes knocking for what she owes? How will they find out? Thanks.  <response>: Said she will just have her mom claim her and seems to think it will all go away.If her mom claims her, her taxes due will almost certainly increase, not decrease, because thats a 4,000 deduction she wont have.How long before the IRS comes knocking for what she owes?It depends on what documentation the IRS has. If they get a W-2 or a 1099-MISC from her employer, theyll figure she owes pretty quick, although it may take them months to do anything. I dont have experience with this except I used to always file in October because I used to be bad with taxes and through wrongly everyone had a 6-month grace period. Never got in any trouble.But yeah, they will eventually file for her and take money from her account or garnish wages. 