2020 Overcontribution

I accidentally contributed too much to my 2020 IRA this year.

 

I contributed $7000 to a traditional IRA and $1000 to a Roth IRA.  My intent was to contribute $6000 to my traditional IRA but I lost track and contributed too much.  The Roth IRA was used in previous years but due to a jump in income in 2019, I wanted to reduce my tax liability as much as possible.

 

I've since purchased and sold several stocks and am now fully invested in stocks.

 

What do I need to do to rectify this situation?

 

I know that I must sell off at least $1000 worth of securities in each account, but how do I know if I owe interest, penalties, etc. and what do I do to withdraw?  I assume an excess contribution form?

 

Any help is appreciated. 

 

Thank you.