Foreign tax credit

What is the procedure for claim ftc form tds that already paid.??

sir i already unknowingly deducted my FTC on TDS as form 24q ON FY 2016-17. but afterwards  only i know that the FTC is separate form TDS. So that after 2017-18 i claimed on FTC for that fy only. Now i want to know that wrongly deducted TDS is APPLICABLE or NOT APPLICABLE. If not means what can i do??