Will filing amended tax return for the additional deduction & credits delay my unemployment credits refund? Should I file my amended tax return now or wait

See this from the IRS    https://www.irs.gov/newsroom/irs-to-recalculate-taxes-on-unemployment-benefits-refunds-to-start-in-m...

and this FAQ

https://ttlc.intuit.com/community/state-taxes/help/do-i-need-to-amend-my-state-return/00/2134732

Just be aware that amended Federal returns take 4-6 months to process.