Regarding your plan, the $6,000 distribution after the extended due date of your 2021 tax return is a nontaxable distribution of Roth IRA contribution basis. Since it's nontaxable, it's also not subject to penalty. The distribution will be reported on 2022 Form 8606 Part III calculating that the taxable amount is zero. This distribution will also appear on 2022 Form 5329 Part IV to eliminate the excess.
