In some cases, yes.
If you can verify your identity and obtain a government gateway user ID and password. You can use this to submit a 3rd party commercial software tax return,
by 31 January each year, which you have to purchase (one that includes the residence section).
A list of commercial software suppliers can be found at Self Assessment commercial software suppliers
If you are unable to verify your identity, then you cannot submit an online return.
You will need to download a paper return and supplementary form from Self Assessment tax return forms
and submit a paper return by 31 October each year.