Bit rusty with Sage still as its been a while since using it but when entering occasional invoices via nominal ledger rather than purchase ledger i'm not sure i'm entering the right tax code, for example:
DR CR t/c
5000 £100.00 1
2201 £20.00 1 (not sure if this should be 1 or 9)
1200 £120 9 (again not sure if this should be 1 or 9)
You mean as a journal? Why would you be doing that?
Judging by those nominal codes, you're simply entering the transaction as a payment - so you should use the bank payments screen. Select your bank account, make the payment to nominal code 5000, and set the tax code as T1 - that'll deal with both sides of the transaction (it's actually stored internaly as a single transaction) and correctly handle the VAT.
If you do it as a journal, as you seem to be, you could run into problems with the VAT - especially if the company you're doing this for is on a cash basis.
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Vince M Hudd - Soft Rock Software
(I only came here looking for fellow apiarists...)