The only fields required to update a batch are the batch number and the valid value date for the batch.
The fields required as a minimum for each voucher are the voucher number, voucher type, debit or credit account number and the amount. If the company is liable to pay tax, and the tax codes are not evident from the account plan, the debit and credit tax code must also be specified. If ledgers are kept and automatic matching of open entries is required during batch updates, you must also have invoice numbers/cross-references on invoices and payments, or join to the Cross-references table to allow you to select cross entries directly.