In the Bills feature, there is no longer a tax column - This disappeared this afternoon. Anyone have a way to put it back on? It's fine if I post an expense

Hi there, @chamilton. Someone might have accidentally hidden the column from the bill form. You can switch it back by checking its box again.
 
In the bill section, click the Gear icon in the right corner near the Customer/Project column. Then tick the Sales Tax box to restore it to its original position.

 
If you have any additional questions or need clarification, you can reply here.