This article explains how to input Base VS Total Loan Amount.
Each product has different requirements:
HELOAN: Only fill in the Base Loan Amount. Minimum loan amount is $25,000.
Fixed HELOC: Base loan amount is the initial draw which must be the greater of $25,000 or 75% of the total line amount. Minimum loan amount is $25,000.
Variable Rate HELOC: Base loan amount is the initial draw which must be the greater of $50,000 or 50% of the total line amount. Minimum loan amount is $50,000.
Each has a maximum total loan or line amount of $500,000