If i put in a change of address with usps will my second stimulus come to my new address?

USPS will forward your mail for one year after you submit the change of address form.

if you are just going to update the address now, then it is very unlikely the IRS will receive it in time; IRS will stop mailing payments on January 15 

I updated it 3weeks ago when I moved.

IRS does not receive the new address from USPS. but somehow the junk mailers find it !