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Model

TotalBaseCalculator

Magento\Tax\Model\Calculation\TotalBaseCalculator

What it does

This class calculates tax totals using a base calculation method that applies delta rounding to ensure accurate tax amounts across multiple line items.

Developers would use this when they need tax calculations that accumulate rounding differences (deltas) to maintain precision in the final tax total, particularly useful for preventing rounding discrepancies in multi-item orders.