You don't normally enter a 8606 itself. It is automatically created when:
1) You make a new non-deductible Traditional IRA contribution.
2) You take a distribution from a IRA that has a after-tax "basis".
3) You make a conversion of a retirement account to a Roth IRA
If none of those occurred, then the last filed 8606 remains in effect
There are some circumstances when a 8606 must be files for other reasons and might require filing a stand-alone 8606.
https://ttlc.intuit.com/questions/1899503-what-is-form-8606-nondeductible-iras-used-for
I have always received this form in my Federal tax return. But not this year. How come?
You don't normally enter a 8606 itself. It is automatically created when:
1) You make a new non-deductible Traditional IRA contribution.
2) You take a distribution from a IRA that has a after-tax "basis".
3) You make a conversion of a retirement account to a Roth IRA
If none of those occurred, then the last filed 8606 remains in effect
There are some circumstances when a 8606 must be files for other reasons and might require filing a stand-alone 8606.
https://ttlc.intuit.com/questions/1899503-what-is-form-8606-nondeductible-iras-used-for