Listed below are the characters that may be used when completing Self Assessment tax return forms for online filing, that are accepted by HMRC’s Self Assessment environment:
Space
(
)
*
,
- (hyphen, not underscore)
.
/
@
NO other characters will be accepted and any Self Assessment tax return which contains any invalid characters will be rejected.
Submissions that are rejected due to an invalid character will normally result in an error message being returned, identifying the offending character. However, certain characters may result in the submission becoming stuck in a 'loop' in the Government Gateway.
There is also a list of further considerations relating to online submissions of Stamp Duty Land Tax (SDLT) returns, see 'Related links'.
The acceptable characters for the online filing of pension scheme returns are as follows:
Space
(
)
*
,
-
_
.
/
%
!
+
:
;
=
?
[
]
^
{
}
~
NO other characters will be accepted and any Self Assessment tax return which contains any invalid characters will be rejected.