To filter out null values in a Salesforce report, add a filter on the field, set the operator to not equal to, and leave the value box completely empty. The report then keeps only records where that field has a value, and every blank (null) row disappears. This is the answer to the common search “salesforce report filter not equal to blank”, and it works the same way for text, number, picklist and lookup fields.
I ran into this when a sales manager asked me for an annual revenue report on accounts. Many account records had nothing in the Annual Revenue field, so the totals and averages were misleading. In this tutorial I will show the exact steps, how the same trick behaves on different field types, how to combine it with filter logic, and what to do when the plain filter is not enough.