Hi Orianne,

At the current time, there is no setting to copy the header invoice description to the detail distribution. Copy/Paste is the way to go for now. I can enter a suggestion for you, though I cannot promise if nor when it could be implemented. It could only take effect if a customer does not have a default distribution code assigned to it.
----
For the entry templates within Receivables, the available fields to visit or skip are based on the header area and not the distributions. The other tax fields you mentioned are just inactive when distribution codes are not in use, rather than being disabled in the entry template.
----
I presume that you want to enter GL accounts directly and not use Distribution codes. How many do you add to a typical invoice? One, or many? Just determining if there are other shortcuts available to get your invoice entry done faster.

If you find that you are entering the same 'set' of GL accounts to invoices on a frequent basis, then you can define this grouping of GL accounts as a 'Distribution set' (with defaulted descriptions and/or amounts if desired) to quickly add many details at a time.