If you don't pay your RE taxes in 2021 then you cannot deduct them on the 2021 tax return.
Check with the property tax office to see what happens if you pay late ... usually there is a penalty or interest added. Where I live they send out the bills in November but they are not due until March but there is a discount for every month you pay early so this is the incentive to get folks to pay early which all escrow accounts will do automatically. Since you don't have an escrow account any longer then it is your responsibility to pay the taxes timely.
