@danilol
<<She did not file her tax to get the withholding back because she thought that once her parent's claim her as dependent then she can not file her tax seperatly to take the holded tax back>>
as discussed above, not true....and she can file through April 18, 2025 to get the refunds.....
<<That means she paid unnecessary tax to the goverment, right?>>
well, she has withholdings that the IRS is holding...she can get it back
<<Can I also understand the $12550 is the threshold that people start to own tax to the goverment? There is no tax should be owned under $12550, right?>>
technically, if you are a W-2 wage earner filing single, and earn under $12,550, the tax is zero. For 2022, under $12,950, there is no tax. The threshold is different for different filing statuses and also different if you are a contractor and receive a 1099-NEC
Note also that the state tax threshholds may be different.
