Set Default Withholding Tax % per Security or Exchange (instead of editing each dividend)

Please add the ability to set a % tax deduction in the settings tab of each security (or at least per exchange/country). Currently, Navexa applies a default 15% withholding tax on dividends. For many investors this isn’t correct, and it creates a lot of repetitive editing. This would be especially useful for: Securities that pay frequent dividends (e.g., weekly). Portfolios with multiple countries and different withholding tax rules. Avoiding manual copy/paste and cross-checking, which is time-consuming and error-prone. Value Having a simple setting to define the default withholding tax rate (at a security, exchange, or country level) would save users a lot of effort and reduce mistakes. The pre-populated numbers are great when they’re correct — but very frustrating when they’re not.