When submitting a tax return through to HMRC, it can sometimes fail with the message 'Network access is disabled'
There are a few reasons for potentially obtaining this error when sending a live submission through the gateway. These include:
For information about Firewall and Proxy settings, please read the article link for Connection error when submitting a tax return to HMRC
External Network Adaptors
On some machines, there may be multiple network connections running even if they are not active on the machine. These can be disabled by following these steps below:
IMPORTANT: Do not disable the current connection that is set or internet connection will be lost.
Once the connections have been disabled, close and restart TaxCalc and attempt re-submission. If it still fails, restart the computer then try again as this can reset certain settings on the router.