Tax break and Tax write-off

Tax break noun - A tax deduction that is granted in order to encourage a particular type of commercial activity.

Tax write-off and tax break are semantically related. In some cases you can use "Tax write-off" instead a noun phrase "Tax break".

Tax write-off noun - A reduction in the gross amount on which a tax is calculated; reduces taxes by the percentage fixed for the taxpayer's income bracket.

Tax break and tax write-off are semantically related. Sometimes you can replace phrase "Tax break" with "Tax write-off", this phrases are similar.