I contributed about $900 excess during 2017. I prefer to just apply it to 2018, but if I need to refund it (to myself..I am self-employed) I will. I'm not sure what form to fill out (if any), or how else to handle it. Can this be done within Turbotax?
If you contributed more for 2017 than is permitted to be deducted and you do not obtain a return of contribution (not a regular distribution) by the due date of your tax return to correct the excess, you must file Form 5330 and pay a 10% penalty (section 4972 excise tax) on the excess. You can then treat the excess as part of your contribution for 2018. TurboTax does not support Form 5330.
Form 5330: https://www.irs.gov/pub/irs-pdf/f5330.pdf
Instructions for Form 5330: https://www.irs.gov/pub/irs-pdf/i5330.pdf
If you contributed more for 2017 than is permitted to be deducted and you do not obtain a return of contribution (not a regular distribution) by the due date of your tax return to correct the excess, you must file Form 5330 and pay a 10% penalty (section 4972 excise tax) on the excess. You can then treat the excess as part of your contribution for 2018. TurboTax does not support Form 5330.
Form 5330: https://www.irs.gov/pub/irs-pdf/f5330.pdf
Instructions for Form 5330: https://www.irs.gov/pub/irs-pdf/i5330.pdf
Do I ask the account holder to "return the contribution "? It's a brokerage account. Will they need to code it a certain way?