The error message "Waste Tank Alert" is an indication that the machine has a problem.

The waste ink tank is almost full. This component is periodic maintenance item that may require replacement after a period of time to ensure optimum performance from your Brother machine. Because this component is periodic maintenance item, the replacement is not covered under the warranty. The need to replace this item and the time period before replacement is dependent on the number of purges and flushes required to clean the ink system. This tank acquires amounts of ink during the different purging and flushing operations. The number of times a machine purges and flushes for cleaning varies depending on different situations. For example, frequently powering the machine on and off will cause numerous cleaning cycles since the machine automatically cleans upon power up. The use of non-Brother ink may cause frequent cleanings because non-Brother ink could cause poor print quality which is resolved by cleaning. The more cleaning the machine requires the faster this tank will fill up.

To solve the problem:

The waste ink tank will need to be replaced soon. Please contact Brother Customer Service from "Contact Us".