<prompt> Human: So the Credit Karma tax filing system has been buggy, so I should have known better than to file with them, but I did it anyways because TurboTax charges 80 to file with a K-1 form.Every time I logged out of Credit Karma it would change my estimated refund amount from 6k federal2k state to 112 federal228 state. It kept overriding my K-1 information when I would log out, so I would have to go back in and uncheck a box... then re-check the box and it would recalculate to the correct value.Well, I made sure before I filed that it showed the correct amounts. I even have the pdf it said it was submitting to the IRS with all the correct amounts on it. But I got an email minutes later saying my federal return was accepted and I thought that was strange because I figured they would want to review a 6k refund, and when I checked, they had accepted the 112 amount, because Credit Karma submitted the incorrect information without my K-1 deduction. State is pending at 228 instead of 2k as well.So what can I do? Is there any way to amend a return for a bigger refund or am I going to get penalized if I try and change it?Edit: To be clear, I specifically checked the pdf to make sure it was right before submitting it, and they changed it after I submitted it. So, sidenote, 010 would not recommend Credit Karma Tax if you have anything more complicated than a W-2 to file.  <response>: amended returns are very easy. The only slightly difficult part is having to print it and physically mail them. 