Do I have any tax obligations when raising funds through PPL?
It depends on the specific country's fiscal system and the project itself. We suggest you talk to a tax specialst. Here's how it works in Portugal:
An individual who gets financed does not have any VAT obligation, as long as the amount doesn't exceed the thresholds set on article 53 of the VAT law. As for tax deductions, you should declare this income as a "single activity" item, according to paragraphs i) and h), section 2, article 3 of IRS code.
A company should declare the income where it will be subject to corporate tax and, eventually, to VAT payment.