get only file name while iterating over directory instead of path with it

script.sh -i /storage/testFile

-i is stores path of /storage/testFile/

I want to iterate over file in testFile. Everything goes good, but I want to make this code more clean, add directory for output and other checks.

A snippet of my code is

for f in $inDir/*.vcf; do if [ -f $f ]; #check if file is true or exists then if [ ${f: -4} == ".vcf" ] # check if the file ends with .vcf then convert2annovar.pl -format vcf4 "$f" > ./"$f".avinput #run my code fi fi done

Issue:

echo $f I get /storage/testFiles/test.vcf

How do I get only test.vcf while I iterate in for loop?