Keep ASV IDs when converting to relative abundance

Hi there,

I am trying to convert the feature table that has taxonomy over to relative abundance. I was able to do this successfully by following this.

I converted the .biom table to a .tsv table that shows the taxonomy and the relative abundance. However, how do I get the ASV IDs? For instance for this bacterium: d__Bacteria;p__Bdellovibrionota;c__Bdellovibrionia;o__Bacteriovoracales;f__Bacteriovoracaceae;g__Peredibacter

I would like to know the ASV ID (e.g., ASV4, ASV30, ASV492).

Thank you.