With the tax filing deadline less than a week away, tax professionals and organizations providing free tax clinics in Calgary are urging residents to start that process as soon as possible to avoid delays amid a bumpy tax season.

Most Albertans have until April 30 to submit their tax returns, and certified tax professional Sharon Numerow with Calgary's Choice Tax Services said she's been flooded with last-minute filings.

Numerow said some people are facing difficulties getting all the slips they …