Final answer:
When a Tax Court decision is entered under Rule 155, it means that the Court computed the refund due to the taxpayer.
Step-by-step explanation:
When a Tax Court decision is said to be entered under Rule 155, it means that the Court computed the refund due the taxpayer. Rule 155 is a procedural rule that allows the court to calculate the amount of refund owed to the taxpayer based on the court's decision. This rule is used when the court has determined that the taxpayer is entitled to a refund and the amount of the refund needs to be calculated.