Where does “jäännösvero” come from?

jäännösvero (Finnish) comes from Finnish jäännös, from Finnish -nnos, from Finnish -ntö, from Finnish -mö, from Finnish -i, from Proto-Uralic -j — oblique plural.

jäännösvero (Finnish): residual tax amount of tax due after all advances and deductions have been accounted for

Definitions

residual tax amount of tax due after all advances and deductions have been accounted for

Ancestry of “jäännösvero”, step by step

jäännösvero traces back through two separate lines of ancestry.

via Finnish jäännös

Step	Language	Word	Meaning
1	Finnish	jäännös	remains; remainder, residue, residual
2	Finnish	-nnos	Forms nouns
3	Finnish	-ntö	—
4	Finnish	-mö	Front vowel variant of -mo
5	Finnish	-i	A nominal suffix used in eg. ukko → ukki; Used...
6	Proto-Uralic	-j	oblique plural

via Finnish vero

Step	Language	Word	Meaning
1	Finnish	vero	tax
2	Proto-Finnic	vero	meal

Every word from Proto-Uralic -j →Every word from Finnish -i →Every word from Finnish -ntö →