The 24th amendment very specifically bans polling taxes
The right of citizens of the United States to vote in any primary or other election for President or Vice President, for electors for President or Vice President, or for Senator or Representative in Congress, shall not be denied or abridged by the United States or any State by reason of failure to pay any poll tax or other tax.
I don't think it's spell check. For whatever reason, VSCode decided that you're writing JS code and is trying to point out syntax errors. There should be some way to change the file type (open the command palette and look for "file type", I suppose)