Question: > 
> There are no items for you to review, matching the filter "[vba]
>  [excel-vba]"
> 
> 
> 

I know all I have been reviewing lately have had a filter on it but I didn't expect to run out after a few days of reviewing :O The last questions I was reviewing were about 2 years old. 

Where does that >90K come from then? (*which tags?*)

I'd rather maintain the good quality of my reviews and avoid other tags which I am not too familiar with so I do not necessarily want to jump into other tags. 

Any suggestions what I can do for *the rest of the day?* <=sarcasm

How difficult is it to review other tags in terms of audits?

Answer: 
When you run out of posts to review for your chosen tags, then I'd filter on 'Too broad' and 'Primarily opinion based'.

Most questions already flagged for those reasons are very easy to recognize as close candidates. Skip any that are unclear to you, but those two reasons should easily exhaust your daily review votes for weeks on end.
Start by removing the tags that you have and see what comes up. In cases where you are unfamiliar with the subject matter and don't want to make a judgement you can just press 'skip'. After you do that for a bunch of posts, you get an idea about which tags don't have enough reviews.