Will loss from sole trader will offset PAYE income

Hi. I have been filling in self assessment for the last 2-3 years. I have multiple income sources including a full time job and a sole trader income. The sole trader is a loss but I don't think the loss is deducted from the total income from other sources. My questions are 1) Is the loss supposed to reduce the total taxable income? 2) If #1 is yes, how can I check if my previous tax was calculated correctly? 3) If #1 is yes, anything I need to do in this tax period to make sure the loss is deducted from total income?

Hi,
If you are using the cash basis then no it needs to be carried forward.
Please refer to:
Relief for trading losses (Self Assessment helpsheet HS227).
Thank you.